[Boatanchors] How Good is the Hickok 752 (non A) tube tester?

[Robert]

Subject says it all.  I have one. I've electronically cleaned all 
contacts/sockets (non-residue electronic cleaner, the tip applied "Pro 
Gold" etc), new rectifier tube (80's series) and wishing comments.  
Regardless, it's a keeper for me here in the shack.  Seems to work well 
for me (for guidance) vs 'plug a new tube in'.

tnx es 73 de robert w4rl pensacola